.whatsapp-widget-fab {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 10;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background-color: #25D366;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 3px 5px rgba(0, 0, 0, 0.2), 0 1px 18px rgba(0, 0, 0, 0.12), 0 6px 10px rgba(0, 0, 0, 0.14);
    transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out, background-color 0.2s ease-in-out;
    text-decoration: none;
    cursor: pointer;
    border: none;
    outline: none;
}

.whatsapp-widget-fab:hover,
.whatsapp-widget-fab:focus {
    background-color: #20ba5a;
    transform: scale(1.08);
    box-shadow: 0 6px 10px rgba(0, 0, 0, 0.3), 0 1px 18px rgba(0, 0, 0, 0.15), 0 10px 20px rgba(0, 0, 0, 0.2);
    text-decoration: none;
    outline: none;
}

.whatsapp-widget-fab svg {
    width: 32px;
    height: 32px;
    display: block;
}

@media (max-width: 576px) {
    .whatsapp-widget-fab {
        bottom: 80px;
        right: 16px;
        width: 52px;
        height: 52px;
    }

    .whatsapp-widget-fab svg {
        width: 28px;
        height: 28px;
    }
}